chapman



(N'Model.) f I T. L. CHAPMAN.

TTTTTTTTTTTTTTTTT R. No. 281,452. Ll?fi-'5.1.3.1F96@ July 17.01883.

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UNITED STATES PATENT OFFICE.

THOMAS L. CHAPMAN, OF HUNTINGTON, WEST-VIRGINIA.

TELEGRAPH-INSULATOR.

SPECIFICATION forming part of Letters Patent No. 281,452, dated July 1'?, 1883.

Application led September E2G, 1882. (No model.)

To a/ZZ whom it may concern.-

Be it known thatv I, T. L. CHAPMAN, of Huntington, in the county ofCabelland State of West Virginia, have invented a certain new and useful Improvement in Telegraph- Insulators 5 and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this speciiication, in which- Figure l is a side'elevation of my improved telegraph-insulator and its bracket. Fig.v 2 is a vertical diametrical section through the saine, thev lower part of the `bracket being broken ofi". Fig. 3 is a horizontal section taken in the plane indicated by dotted line :v x, on Figs. l and 2.

This invention relates to insulators for telegraph-wires when the wires are sustained on poles, or by means of brackets applied to any iixed object 5 and the nature of my invention consists in a swivel-insulator removably applied on a bracket and constructed with a wire-slot formed by hooks, and also with a ticgroove on its periphery, as will. be fully understood from the following description, when taken in connection with the annexed draw- Bther features of my invention will be understood from what follows yz In the annexed drawings, A designates a bracket, which may bev constructed in any suitable manner and adapted to be secured by bolts, spikes, or other means to a telegraph`-pole, or to any other established object. On the upper end of this bracket A, I form a cylinder, B, the axis of which is vertical, and the sides of which are grooved diametrically opposite each other, as indicated at a a. At the base of this cylinder I form an annular groove, b. The top of cylinder B is ilat. This cylinder is in facta pintle or pivot, about which thev insulator C is allowed to oscillatc. The insulator consists of a cylinder oi' glass or other suitable non-conductor of electricity. It is constructed with a conetop, c, a central bore, lugs d d, which play in the annular groove b, and with an upright hook, e, and an inverted hook, e. The two hooks are so formed and arranged that they leave a vertical slot, f, which is as broad as the said hooks. The ends of the hooks are beveled so as to form a downwardly-directed slot, g, leading into the vertical slotf. This insulator, with its double hooks, its lugs, and with a groove, j, in a plane near the base of the vertical slot f, can be readily cast entire of glass or other vitreous or non-conducting material.

a shoulder of the bracket the said lugs willcome within the horizontal. annular groove, and the insulator will be held down in its place, althoughl allowed to rotate about its pintle.

It is obvious that the insulator can be removed from its bearing or pintle by so adjusting it that the lugs d d are made to reg ister with the vertical grooves in the cylindrical pintle.

Now, in order to apply a wire to my improved swivel-insulator, I simply pass it through the horizontal slot, and by its own tension it will fall into the vertical groove and will be there held. At certain places in the line I propose to tie the wire to theinsnlator,using the groove above referred to, thus preventing what is known as lost wire.77

My improved insulator affords great facility for applying wires and for taking down the same, especially when temporary wires are arranged in a line. It is thus obvious that I hold the wire'without tying, except at a few points in the line. Y

Having described my invention, I claim as new and desire to secure by Letters Patent- The telegraph-wire insulator consisting of the hollow cylindre-conical body O, the lugs d d at the base thereof, the npturned and inverted hooks e e', arranged in the same vertical plane to form a slot, f, and an incline passage, g, and the groovcj, in combinationwith the bracket-pintle B, having vertical grooves a a, and an annular groove, b, all constructed and adapted to operate substantially in the manner and for the purposes described.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

THOMAS L. CHAPMAN. lVitnesses:

JOHN H. OLEY,

WV. J. HALLER.

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